In a message dated 5/9/2008 6:05:27 A.M. Eastern Daylight Time,  
[EMAIL PROTECTED] writes:
Hi Jim, Snips,

The  field wire is connected to the hot side of the 
battery through the starter  switch. 
Hope that you meant an on/off shades of an ignition switch. Even then it  
would be full fielded with your battery's low and would probably make the  
starter grunt'n groan.

There is  no battery switch in this  circuit.
And no survey has caught that ?
 

>From my  distant and hazy past I know that there is a special wire going 
to the  sense side of the alternator.  It is a solid wire and  "feels"  
different.  I can't recall if I ever knew why it was special but my  Dad 
was an automotive electrical expert and I'm sure he told me about not  
replacing that wire with just any old wire, but not why. 

So my  question is does anyone know what is special about that wire?  Is 
it  fusible?  Is it resistance wire?  Is it my  imagination?
Yes maybe.... but ......    a piece of wire that reduced the  sense wire 
voltage so that the internal regulator would produce more  output.  Many people 
have wired in a switched in /out diode to reduce that  voltage by .5 or .6 V to 
do the same thing.  
 
More to my way of thinking in re automotive....
As you state that wire felt funny and if on the output stud then  it would 
probably be a fusible link.  A fusible link is a piece of wire  four times 
smaller that the circuit it protects, normally coated with Hypalon  insulation 
so 
that if it fries then the insulation would still be there so that  you could 
measure the length and replace with a duplicate, after fixing the  problem of 
course.
If it broke then there was normally a hard plastic piece that would stop  the 
"hot wire" from grounding out.    The fusible link has been  replaced with 
maxi fuses on many vehicles in the last 10 years of so.
 
 If you said it was coiled up in curls then it was to take the  vibration 
without breaking the wire at the connector.
 
Carl Hibbard

 



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